Floor mat



FIG. 1 is a perspective view of a floor mat showing my new design in full lines with the broken line showing of environmental association matter being for illustrative purposes only and forming no part of the claimed design;

FIG. 2 is a top view of the floor mat in full lines, with the environmental matter being for illustrative purposes only and forming no part of the claimed design;

FIG. 3 is a bottom view of the floor mat in full lines, with the environmental matter being for illustrative purposes only and forming no part of the claimed design;

FIG. 4 is a right side view of the floor mat in full lines, with the environmental matter being for illustrative purposes only and forming no part of the claimed design. The left side is symmetrical; and,

FIG. 5 is a rear view of the floor mat. 

The ornamental design for a floor mat, as shown and described. 